| Company | Timeline | Status | |
| D.S. Johnston Properties Limited Director • Director | 14 Nov 2023←1 Year 11 Months→Current | Active | |
| XRN Engineering Limited Director • Unreported | 1 Jun 2009←16 Years→Current | Active | |
| D.S. Johnston (Holdings) Limited Director • Bookkeeper | 1 Jan 2007←18 Years→Current | Active | |
| Classic And Modern Engine Services Limited Secretary • Unreported | 19 Jun 2002←6 Years→27 Apr 2009 | Active | |
